Ruby on Rails Developer - #2633303

Industry: FinTech / Financial Services  

HQ & Locations: HQ Dresden (DE); small office in Berlin (DE)  

Founded / Size: ~2012 / ~40 employees  

Core Business: Digital financing solutions (factoring, fine-trading, etc.) for freelancers, start-ups and SMEs via self-built web platform  

Mission & Vision: Simplify financial processes so entrepreneurs can focus on growing society-advancing businesses; act as a modern alternative to traditional house banks  

Key Values: Openness, honesty, flat “Du” culture, autonomy, agility, long-term employee retention  

Culture & Work Environment: Small, tight-knit, agile teams; direct communication; high ownership; regular social events; flexible ways of working  

Unique Selling Points: Fully in-house developed platform; direct impact on product & architecture; quick decision cycles; combination of internal & external users offers varied challenges  

Role Overview  

Job Title: Ruby on Rails Backend Developer (m/f/d)  

Department / Team: Engineering / Product Development  

Reason for Hiring: Growth – extend feature set, connect additional finance products, ensure stability & bug fixing  

Reports to: Head of Product  

Team Size: 3 senior Rails engineers (direct colleagues)  

No. of Vacancies: 1  

Location & Working Model  

Primary Location: Dresden, Germany  

Alternative Offices: Berlin, Germany (small satellite)  

Hybrid – 2-3 home-office days per week; not fully remote  

Travel Requirements: None  

Key Responsibilities  

Design and build new features for in-house Ruby on Rails applications  

Develop robust backend logic and REST APIs  

Write & optimise complex SQL queries; tune PostgreSQL for performance and scalability  

Build and maintain internal admin tools using Hotwire, Turbo & Stimulus  

Refactor, modernise and maintain existing codebase to ensure platform stability  

Support customer-facing teams with bug fixing & ticket resolution  

Assist in maintaining legacy Python scripts and migrating them to the Ruby stack  

Ideal Candidate Profile  

Must-Haves:  

2+ years professional Ruby on Rails development  

Strong SQL/PostgreSQL expertise  

Experience with REST APIs & modern Rails frontend (Hotwire/Turbo/Stimulus)  

Fluent German (C1) for close collaboration with customer support  

Ability to work on-site in Dresden 2-3 days/week  

Nice-to-Haves:  

Python knowledge (for legacy scripts)  

AWS, Sidekiq, Minitest/Oaken testing experience  

Personality Traits:  

Self-driven & proactive  

Agile, adaptable, forward-thinking  

Quick to grasp new domains (finance processes)  

Open, honest communicator & strong team player  

Passionate about writing clean, maintainable code (“Rails Way”)  

Experience & Education  

Experience: Minimum 2 years professional Rails development; mid-level – senior guidance available  

Education: Degree not required – skills & experience valued over formal credentials  

Specific Tools/Technologies: Ruby on Rails, PostgreSQL, REST, Hotwire/Turbo/Stimulus, Sidekiq, Git, AWS, Python (legacy), Minitest/Oaken  

Compensation  

Base Salary Range: €60,000 – €70,000 gross p.a.

Contract Details  

Contract Type: Permanent employment (unbefristet)  

Working Hours: 30–40 h/week (full-time or part-time ≥30 h) with flexible scheduling  

Vacation Days: 28 days/year  

Perks  

1,500 € annual training budget  

Company pension scheme  

Shopping card allowance  

Flexible hours & hybrid work  

28 vacation days  

Intensive personalised onboarding with team rotations  

Regular team events & Stammtische  

• High ownership and freedom to shape product & tech decisions